I'm a tradesman, at my work we always start at 7am for an 8hr day. If we're busy and doing overtime we start at 6am for a 10hr day. Im at a computer for a third to a half of my day, otherwise I'm walking and packing and on a forklift.

I'm at the gym by 5am for an hour or so for weights abd running.

There are no cool white fluoros or CFLs in my house, nor outside.

I find this regime thoroughly exhausts me physically and mentally, and I have no trouble falling asleep and staying alseep unless I get cold.